 A happy crawl space is a dusty crawl space. I need to coin that term. But yeah, you pat on the ground and if dust flies, that's good. But if it's moist and what happens is that moisture tries to evaporate, gets up in that insulation, gets it real heavy and it starts drooping and sagging, then you might have a sick crawl space. That might be one you want to reconsider putting a big due diligence down on. So I would say moisture. A couple of other things. When you're walking around the house and inside the house,